Being unable to tolerate a food can be very aggravating. A food allergy, by contrast, is easy to spot, as you will react very quickly after ingestion. But an intolerance takes longer to become evident, and the person who has it might not even realize the cause. Or you can go out of your way to eliminate certain foods, and still not discover what the culprit is. So, a food intolerance test can determine the culprit a lot better than food elimination.

The first legend that needs to be dispelled is that people who are intolerant to certain foods are allergic to those food items. Food allergies are not the same as having an intolerance to those foods. The symptoms of food allergies are usually strong and come on quite suddenly, whereas food intolerances usually cause symptoms that are less severe, and can take up to 72 hours to appear. By taking a food intolerance test you will quickly discover which are the offending foods.

With a food allergy, your body is in fact allergic to the food in question and the reaction is that of your immune system itself fighting back, very comparable to if you were allergic to pollen. With food intolerance, the immune system does not come into the picture.

Your body won't recognize that fact that it has been invaded by an outside substance. However, the places that usually work to eliminate food, like your stomach and intestines, are intolerant to certain parts of the food so will have an adverse reaction to those ingredients.

If your body stops producing or doesn't produce specific enzymes needed to breakdown a certain food then an intolerance will occur. As we grow and our bodies change this can sometimes happen to us. For example, many people become lactose intolerant because the chemical needed to suitably digest lactose decreases as we age. It can take several years for the unpleasant intolerance symptoms to show up.

When trying to determine foods that your body is intolerant to you have a few different options. One way is to eliminate everything in your diet except the few foods such as; brown rice, lamb and water that most don't have issues with. Eat only these foods for approximately three weeks. Then after the three weeks you can start to reintroduce one new food every few days. If you keep a food diary throughout this process you will be able to document which food you had problems with and which your body processed normally. In 6 to 9 months of continuing this process you will have a pretty good idea what foods affect you negatively.

Another means of finding out which ingredients your system cannot cope with is the ELISA lgG test, specifically designed to determine food intolerances. More than 200 foods can be examined that way, with only a small amount of blood needed to do so. When you begin cutting out the problem foods, you generally discover that you are more energetic, you digest the remainder of your foods more easily, and sleeping is facilitated as well. Lots of people also enjoy the extra advantage of a quick weight loss!